Blood urea nitrogen (BUN) levels give important kidney-related information that aids in diagnosing conditions, including uraemia and Chronic kidney disease. BUN test results above 20 mg/dL are deemed abnormal and might have several causes.
However, kidney injury should be treated immediately if the BUN level is dangerously high, which frequently starts at 50 mg/dL. BUN levels between 100 mg/dL and 250 mg/dL may indicate serious renal failure, specifically impaired filtration of waste materials.
BUN and creatinine are used in conjunction to calculate renal function. However, a dehydrated body might result in a high BUN: creatinine ratio since a person’s fluid intake influences renal function to some extent. Additionally, known as pre-renal azotemia.
Blood Urea Nitrogen (BUN) Blood Test
A BUN test specifically detects the level of urea nitrogen in the blood. The kidneys eliminate the chemical waste product urea nitrogen from the body. Conditions including dehydration, urinary tract obstruction, or gastrointestinal bleeding will occur if this is not the case. BUN levels provide important information about your renal function unless combined with another kidney function.
BUN levels provide important information about your renal function, but unless combined with other kidney function tests, they do not allow for a direct diagnosis of any illness. BUN levels in the normal range should range from 6 to 20 mg/dL. Your BUN level exceeds the top limit (>20 mg/dL), regarded as excessively high.
Symptoms of High BUN Level
The results of the BUN test and other related tests can be used to diagnose renal disease. which include the following:
Creatinine levels in the blood are typically constant, although BUN levels might fluctuate. Creatinine is a by-product of the breakdown of muscular tissue. The source of creatinine is creatinine, a protein that helps provide the energy needed for muscle contractions. Creatinine is eliminated from the body by the kidneys. When the kidneys are not working properly, the blood’s concentration of creatinine increases. A BUN to creatinine ratio can be used to identify illnesses such as intestinal bleeding, kidney disease, dehydration, and others.
What leads to excessive BUN creatinine levels?
Symptoms of the underlying disorders are frequently present, along with abnormal BUN to creatinine ratios caused by those diseases.
Causes of high BUN to creatinine levels include:
Dehydration is one crucial aspect among many others. Kidney function is impacted when the body’s fluid balance is unfavorable. Dehydration is indicated in this situation by a high BUN: Creatinine ratio; however, the good news is that it is reversible.
The high BUN: creatinine ratio can be improved by drinking enough fluids. The high BUN-Creatinine ratio typically suggests dehydration, especially if it is greater than 20 and the person has a normal creatinine level.
2. High Protein Intake
A diet rich in protein is one of the most frequent causes of increased BUN levels in the blood. The BUN: creatinine ratio will be corrected as the blood creatinine level steadily increases and catches up. Generally speaking, eating a lot of protein will promote muscle growth.
Therefore, a high BUN/Creatinine ratio can first be caused by a high-protein diet. If the same person exercises a lot and does not drink water right after, their BUN to creatinine ratio will be higher.
3. Certain Medicines
Diuretics, which are frequently prescribed for water retention, can cause the BUN and creatinine levels to rise. Therefore, diuretic patients should undergo periodic laboratory electrolyte and renal function testing.
4. Kidney diseases
In most cases, a BUN and creatinine test, coupled with urine tests, are used to diagnose patients with chronic kidney disease from various factors (often high blood pressure, diabetes, etc.). Medical professionals should always be consulted when imaging tests like CT or ultrasounds are necessary.
Addressing any imbalance between BUN and creatinine is critical since it frequently signals a dangerous medical issue. The BUN/creatinine ratio will return to the normal range if the disease is addresses properly. Your physician will do their best to determine an accurate diagnosis and a suitable course of action.
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